With over 28 million square feet of office space, Tysons Corner is one of the largest suburban submarkets in the United States. And it’s about to get bigger. At the start of December, American Real Estate Partners and The Association For Manufacturing (AMT) announced they will jointly develop a 200,000-square-foot trophy office building to anchor Tysons’ Arbor Row master planned district.

The company paid $13.4 million to acquire Tierra Santa, a 274-unit property at 4620 W. McDowell Road. ARA Newmark brokered the transaction, which was subject to a $10 million loan originated by Walker and Dunlop.